15:17
Some thoughts on invoking interfaces: Interfaces will get a hashcode associated with them. It will check the instance's interface table and try to see if it can quickly get the desired interface:
XTable xTable = i2xTable[target.className().hashCode() &
(i2xTable.length - 1)];
if (xTable == COLLISION)
xTable = linearScan(i2xTable, target);
invokeXTable(xTable, methodId, args);